研究论文

CaTiO3对(1-x)ZnAl2O4-xMg2TiO4(x=0.21)微波介质陶瓷结构和性能的影响

  • 雷 文 ,
  • 吕文中 ,
  • 王晓川 ,
  • 梁 军 ,
  • 江建军
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  • (华中科技大学 电子科学与技术系, 武汉 430074)

收稿日期: 2008-12-31

  修回日期: 2009-04-23

  网络出版日期: 2009-09-20

Effects of CaTiO3 on Microstructures and Properties of
(1-x)ZnAl2O4-xMg2TiO4(x=0.21) Microwave Dielectric Ceramics

  • LEI Wen ,
  • LVWen-Zhong ,
  • WANG Xiao-Chuan ,
  • LIANG Jun ,
  • JIANG Jian-Jun
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  • (Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

Received date: 2008-12-31

  Revised date: 2009-04-23

  Online published: 2009-09-20

摘要

利用常规固相法制备了ZnAl2O4-Mg2TiO4-CaTiO3陶瓷, 研究了CaTiO3对其相成分、微观组织结构和微波介电性能的影响规律. 结果表明, CaTiO3能有效地改善(1-x)ZnAl2O4-xMg2TiO4(x=0.21)材料的烧结性能, 使其致密化温度降低150℃. ZnAl2O4-Mg2TiO4-CaTiO3陶瓷体系中包括ZnAl2O4基尖晶石相、CaTiO3、MgTi2O5和Zn2Ti3O8相, 当烧结温度高于1400℃时, Zn2Ti3O8相消失. 随着CaTiO3含量的增加, 体系中CaTiO3相含量增加而MgTi2O5相含量减少, 且CaTiO3具有显著地调节谐振频率温度系数的作用. 当在(1-x)ZnAl2O4-xMg2TiO4(x=0.21)体系中掺入6mol%的CaTiO3添加剂时, 经1400℃烧结后能获得温度稳定性好的微波介质陶瓷材料, 其微波介电性能为:εr=11.8, Q·f=88080GHz, τf=-7.8×10-6/℃.

本文引用格式

雷 文 , 吕文中 , 王晓川 , 梁 军 , 江建军 . CaTiO3对(1-x)ZnAl2O4-xMg2TiO4(x=0.21)微波介质陶瓷结构和性能的影响[J]. 无机材料学报, 2009 , 24(5) : 957 -961 . DOI: 10.3724/SP.J.1077.2009.00957

Abstract

ZnAl2O4-Mg2TiO4-CaTiO3 ceramics were prepared by the solid-state reaction. The effects of CaTiO3 on phase compositions, microstructure and microwave dielectric properties were investigated. It shows that CaTiO3 can effectively improve the sinterability of the ceramics and lower the densification temperature by about 150℃. ZnAl2O4-based spinel, CaTiO3, MgTi2O5 and Zn2Ti3O8 phases are included in the ZnAl2O4-Mg2TiO4-CaTiO3 system, however, Zn2Ti3O8 phase disappears when the sintering temperature is higher than 1400℃. As CaTiO3 content increases, CaTiO3 phase in the sintered body raises while MgTi2O5 phase reduces. Furthermore, CaTiO3 can adjust obviously the temperature coefficient of resonant frequency of the (1-x)ZnAl2O4-xMg2TiO4(x=0.21) ceramics. When 6mol% CaTiO3 is added to the (1-x)ZnAl2O4-xMg2TiO4 (x=0.21) system, a temperature-stable microwave dielectric ceramics sintered at 1400℃ with an εr of 11.8, a Q·f of 88080GHz and a τf of -7.8×10-6/℃ can be obtained.

参考文献

[1]Tsunooka T, Androu M, Higashida Y, et al. J. Eur. Ceram. Soc., 2003, 23(14): 2573-2578.
[2]Kim J C, Kim M H, Lim J B, et al. J. Am. Ceram. Soc., 2007, 90(2): 641-644.
[3]Surendran K P, Santha N, Mohanan P, et al. Eur. Phys. J. B, 2004, 41(3): 301-306.
[4]Zheng C W, Wu S Y, Chen X M, et al. J. Am. Ceram. Soc., 2007, 90(5): 1483-1486.
[5]Lei W, Lu W Z, Zhu J H, et al. J. Am. Ceram. Soc., 2008, 91(6): 1958-1961.
[6]Lei W, Lu W Z, Liu D, et al. J. Am. Ceram. Soc., 2009, 92(1): 105-109.
[7]Hakki B W, Coleman P D. IRE Trans. Microwave Theory Tech., 1960, 8(7): 402-410.
[8]Lei W, Lu W Z, Zhu J H, et al. Mater. Lett., 2007, 61(19/20): 4066-4069.
[9]Su H, Wu S H. Mater. Lett., 2005, 59(18): 2337-2341.
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